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Abstract

High speed electro-optical cavity dumping is demonstrated with diode-pumped mode-locked laser oscillators, namely a femtosecond Yb:glass and a picosecond Nd:YVO4 oscillator. Repetition frequencies exceeding 1MHz are obtained with pulse energies of more than 300nJ/1µJ. Being compact and easy to operate light sources, these laser systems open up various scientific and industrial applications.

Figures (5)

Power spectra for increasing dumping frequencies from 475 kHz to 1.1 MHz. On the right the autocorrelation signal in blue is depicted at 1.1MHz with a width of τ=420fs resulting in a pulse width of 250 fs, assuming a sech2-shaped pulse. The fit to the autocorrelation of a sech2 pulse is shown as the dashed red curve.

Left: power spectrum of the 750 nJ pulse with a spectral width of 2.9 nm. The inset shows the autocorrelation signal (ACS) with a width of τ=780fs resulting in a pulse width of 470 fs, assuming a sech2-shaped pulse. The fit to the autocorrelation of a sech2 pulse is shown as the dashed red curve. Right: Intra-cavity energy transient.

Left: Typical autocorrelation of the output pulses at a dumping rate of 1.02 MHz. Right: Normalized intra-cavity pulse energy in dependence on the number of round-trips (the residual ripples in the curve are due to aliasing).